Is TRACE's High Spatial Resolution High Enough for Isothermal Temperature Analysis?

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Scientific paper

It has been suggested that TRACE may be able to resolve individual isothermal coronal loop strands. If this is true, then isothermal temperature analysis using filter ratios from TRACE data could provide accurate measurements of the temperature of coronal loops. In this case, it follows that EIT, with significantly lower spatial resolution, would provide statistically different results for the same loop since the EIT pixel would have to contain some flux from the background. We analyze several loops for which data from both instruments are available in the 171, 195, and 284 A passbands and compare EIT and TRACE temperature analysis results from both the 171:195 and 195:284 filter ratios. Do our results suggest that TRACE's 0.5 arcsec spatial resolution is substantial enough to provide accurate temperature analysis? Solar physics research at the University of Memphis is supported by grants from NSF and NASA.

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